<?php
#   
# PHPZip v1.2 by Sext ([email]sext@neud.net[/email]) 2002-11-18  
#         (Changed: 2003-03-01)  
#   
# Makes zip archive  
#  
# Based on "Zip file creation class", uses zLib  
#  
# Examples in sample1.php, sample2.php and sample3.php  
#  
# Useage:
# 1.
# require("PhpZip.class.php");  
# $z = new PhpZip(); //新建立一个zip的类  
# $z -> Zip("D:/test/test/ziplib/", "out3.zip"); //前边为你要打包的路径，后边为文件名。如果不加路径直接打到当前目录     
# 2.
# require("PhpZip.class.php");  
# $z = new PhpZip(); //新建立一个zip的类  
# $files=array('3.jpg','2.jpg');//指定要打包的文件  
# $z -> Zip($files, "out2.zip");   
   
class PhpZip  
{  
        //fenghao add this to zip the files which are query from db
		//it maybe need to debug
		//$files is a array. the array's key is file's name; the array's value is thi file's content
		function zip_query($files){
			if(is_array($files)){
				foreach($files as $filename => $content){
					//$filename = mb_convert_encoding($filename, "GB2312", "UTF-8");
					$this -> addFile($content, $filename);  
				}
				return $this -> file();  
			}else{
				return 0;
			}
		}
		function Zip($dir, $zipfilename)  
        {  
            if (@function_exists('gzcompress'))  
                {          
					$curdir = getcwd();  
					if (is_array($dir))   
					{  
						$filelist = $dir;  
					}  
					else   
					{  
						$filelist = $this -> GetFileList($dir);  
					}  
					  
					if ((!empty($dir))&&(!is_array($dir))&&(file_exists($dir))) chdir($dir);  
					else chdir($curdir);  

					if (count($filelist)>0)  
					{  
							foreach($filelist as $filename)  
							{  
									if (is_file($filename))  
									{  
											$fd = fopen ($filename, "r");  
											$content = fread ($fd, filesize ($filename));  
											fclose ($fd);  

											if (is_array($dir)) $filename = basename($filename);  
											$this -> addFile($content, $filename);  
									}  
							}  
							$out = $this -> file();  

							chdir($curdir);  
							$fp = fopen($zipfilename, "w");  
							fwrite($fp, $out, strlen($out));  
							fclose($fp);  
					}  
					return 1;  
                }   
                else return 0;  
        }  

        function GetFileList($dir)  
        {  
                if (file_exists($dir))  
                {  
                        $args = func_get_args();  
                        $pref = $args[1];  
             
                        $dh = opendir($dir);  
                        while($files = readdir($dh))  
                        {  
                                if (($files!=".")&&($files!=".."))   
                                {  
                                        if (is_dir($dir.$files))   
                                        {  
                                                $curdir = getcwd();  
                                                chdir($dir.$files);  
                                                $file = array_merge($file, $this -> GetFileList("", "$pref$files/"));  
                                                chdir($curdir);  
                                        }  
                                        else $file[]=$pref.$files;  
                                }  
                        }  
                        closedir($dh);  
                }  
                return $file;  
        }  

    var $datasec      = array();  
    var $ctrl_dir     = array();  
    var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";  
    var $old_offset   = 0;  

    /**  
     * Converts an Unix timestamp to a four byte DOS date and time format (date  
     * in high two bytes, time in low two bytes allowing magnitude comparison).  
     *  
     * @param  integer  the current Unix timestamp  
     *  
     * @return integer  the current date in a four byte DOS format  
     *  
     * @access private  
     */  
    function unix2DosTime($unixtime = 0) {  
        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);  

        if ($timearray['year'] < 1980) {  
                $timearray['year']    = 1980;  
                $timearray['mon']     = 1;  
                $timearray['mday']    = 1;  
                $timearray['hours']   = 0;  
                $timearray['minutes'] = 0;  
                $timearray['seconds'] = 0;  
        } // end if  

        return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |  
                ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);  
    } // end of the 'unix2DosTime()' method  

    /**  
     * Adds "file" to archive  
     *  
     * @param  string   file contents  
     * @param  string   name of the file in the archive (may contains the path)  
     * @param  integer  the current timestamp  
     *  
     * @access public  
     */  
    function addFile($data, $name, $time = 0)  
    {  
        $name = str_replace('\\', '/', $name);  

        $dtime = dechex($this->unix2DosTime($time));  
        $hexdtime = '\x' . $dtime[6] . $dtime[7]  
                  . '\x' . $dtime[4] . $dtime[5]  
                  . '\x' . $dtime[2] . $dtime[3]  
                  . '\x' . $dtime[0] . $dtime[1];  
        eval('$hexdtime = "' . $hexdtime . '";');  

        $fr   = "\x50\x4b\x03\x04";  
        $fr   .= "\x14\x00";            // ver needed to extract  
        $fr   .= "\x00\x00";            // gen purpose bit flag  
        $fr   .= "\x08\x00";            // compression method  
        $fr   .= $hexdtime;             // last mod time and date  

        // "local file header" segment  
        $unc_len = strlen($data);  
        $crc     = crc32($data);  
        $zdata   = gzcompress($data);  
        $c_len   = strlen($zdata);  
        $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug  
        $fr      .= pack('V', $crc);             // crc32  
        $fr      .= pack('V', $c_len);           // compressed filesize  
        $fr      .= pack('V', $unc_len);         // uncompressed filesize  
        $fr      .= pack('v', strlen($name));    // length of filename  
        $fr      .= pack('v', 0);                // extra field length  
        $fr      .= $name;  

        // "file data" segment  
        $fr .= $zdata;  

        // "data descriptor" segment (optional but necessary if archive is not  
        // served as file)  
        $fr .= pack('V', $crc);                 // crc32  
        $fr .= pack('V', $c_len);               // compressed filesize  
        $fr .= pack('V', $unc_len);             // uncompressed filesize  

        // add this entry to array  
        $this -> datasec[] = $fr;  
        $new_offset        = strlen(implode('', $this->datasec));  

        // now add to central directory record  
        $cdrec = "\x50\x4b\x01\x02";  
        $cdrec .= "\x00\x00";                // version made by  
        $cdrec .= "\x14\x00";                // version needed to extract  
        $cdrec .= "\x00\x00";                // gen purpose bit flag  
        $cdrec .= "\x08\x00";                // compression method  
        $cdrec .= $hexdtime;                 // last mod time & date  
        $cdrec .= pack('V', $crc);           // crc32  
        $cdrec .= pack('V', $c_len);         // compressed filesize  
        $cdrec .= pack('V', $unc_len);       // uncompressed filesize  
        $cdrec .= pack('v', strlen($name) ); // length of filename  
        $cdrec .= pack('v', 0 );             // extra field length  
        $cdrec .= pack('v', 0 );             // file comment length  
        $cdrec .= pack('v', 0 );             // disk number start  
        $cdrec .= pack('v', 0 );             // internal file attributes  
        $cdrec .= pack('V', 32 );            // external file attributes - 'archive' bit set  

        $cdrec .= pack('V', $this -> old_offset ); // relative offset of local header  
        $this -> old_offset = $new_offset;  

        $cdrec .= $name;  

        // optional extra field, file comment goes here  
        // save to central directory  
        $this -> ctrl_dir[] = $cdrec;  
    } // end of the 'addFile()' method  


    /**  
     * Dumps out file  
     *  
     * @return  string  the zipped file  
     *  
     * @access public  
     */  
    function file()  
    {  
        $data    = implode('', $this -> datasec);  
        $ctrldir = implode('', $this -> ctrl_dir);  

        return  
            $data .  
            $ctrldir .  
            $this -> eof_ctrl_dir .  
            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries "on this disk"  
            pack('v', sizeof($this -> ctrl_dir)) .  // total # of entries overall  
            pack('V', strlen($ctrldir)) .           // size of central dir  
            pack('V', strlen($data)) .              // offset to start of central dir  
            "\x00\x00";                             // .zip file comment length  
    } // end of the 'file()' method  
} // end of the 'PHPZip' class  
?>
